3031-74-1Relevant articles and documents
Watson,Darwent
, p. 577 (1957)
Cloutour et al.
, p. 157,160 (1977)
Heicklen,Johnston
, p. 4394,4396-4397 (1962)
Callear,Pereira
, p. 2774 (1963)
A new method for the synthesis of primary hydroperoxides. A useful application of bis(tributyltin) oxide in the hydrolysis of peroxyesters
Baj, Stefan,Chrobok, Anna
, p. 623 - 624 (2001)
Hydrolysis of peroxyesters in the presence of bis(tributyltin) oxide provides a new method for the synthesis of hydroperoxides including methyl and ethyl hydroperoxide.
Kinetics and branching ratio studies of the reaction of C2H 5O2 + HO2 using chemical ionisation mass spectrometry
Teresa Raventos-Duran,Percival, Carl J.,McGillen, Max R.,Hamer, Paul D.,Shallcross, Dudley E.
, p. 4338 - 4348 (2007)
The overall rate coefficient for the reaction of C2H 5O2 with HO2 was determined using a turbulent flow chemical ionization mass spectrometer (TF-CIMS) system over the pressure range of 75 to 200 Torr and temperatures between 195 and 298 K. The temperature dependence of the overall rate coefficient for the reaction between C 2H5O2 and HO2 was fitted using the following Arrhenius expression: k(T) = (2.08-0.62+0.87) × 10-13 exp [(864 ± 79)/T] cm-3 molecule -1 s-1. The upper limits for the branching ratios for reactive channels leading to O3 and OH production were quantified for the first time. A tropospheric model has been used to assess the impact of the experimental error of the rate coefficients determined in this study on predicted concentrations of a number of key species, including O3, OH, HO2, NO and NO2. In all cases it is found that the propagated error is very small and will not in itself be a major cause of uncertainty in modelled concentrations. However, at low temperatures, where there is a wide discrepancy between existing kinetic studies, modelling using the range of kinetic data in the literature shows a small but significant variation for [C2H5O2], [C2H 5OOH], [NOx] and the HO2:OH ratio. Furthermore, a structure-activity relationship (SAR) was developed to rationalise the reactivity of the reaction between RO2 and HO2. the Owner Societies.
Highly efficient visible-light photocatalytic ethane oxidation into ethyl hydroperoxide as a radical reservoir
Zhu, Yao,Fang, Siyuan,Chen, Shaoqin,Tong, Youjie,Wang, Chunling,Hu, Yun Hang
, p. 5825 - 5833 (2021/05/07)
Photocatalytic ethane conversion into value-added chemicals is a great challenge especially under visible light irradiation. The production of ethyl hydroperoxide (CH3CH2OOH), which is a promising radical reservoir for regulating the oxidative stress in cells, is even more challenging due to its facile decomposition. Here, we demonstrated a design of a highly efficient visible-light-responsive photocatalyst, Au/WO3, for ethane oxidation into CH3CH2OOH, achieving an impressive yield of 1887 μmol gcat?1in two hours under visible light irradiation at room temperature for the first time. Furthermore, thermal energy was introduced into the photocatalytic system to increase the driving force for ethane oxidation, enhancing CH3CH2OOH production by six times to 11?233 μmol gcat?1at 100 °C and achieving a significant apparent quantum efficiency of 17.9% at 450 nm. In addition, trapping active species and isotope-labeling reactants revealed the reaction pathway. These findings pave the way for scalable ethane conversion into CH3CH2OOH as a potential anticancer drug.
The Role of Copper Speciation in the Low Temperature Oxidative Upgrading of Short Chain Alkanes over Cu/ZSM-5 Catalysts
Armstrong, Robert D.,Peneau, Virginie,Ritterskamp, Nadine,Kiely, Christopher J.,Taylor, Stuart H.,Hutchings, Graham J.
, p. 469 - 478 (2018/01/27)
Partial oxidative upgrading of C1–C3 alkanes over Cu/ZSM-5 catalysts prepared by chemical vapour impregnation (CVI) has been studied. The undoped ZSM-5 support is itself able to catalyse selective oxidations, for example, methane to methanol, using mild reaction conditions and the green oxidant H2O2. Addition of Cu suppresses secondary oxidation reactions, affording methanol selectivities of up to 97 %. Characterisation studies attribute this ability to population of specific Cu sites below the level of total exchange (Cu/Al0.5). These species also show activity for radical-based methane oxidation, with productivities exceeding those of the parent zeolite supports. When tested for ethane and propane oxidation reactions, comparable trends are observed.
Partial oxidation of ethane to oxygenates using Fe- and Cu-containing ZSM-5
Forde, Michael M.,Armstrong, Robert D.,Hammond, Ceri,He, Qian,Jenkins, Robert L.,Kondrat, Simon A.,Dimitratos, Nikolaos,Lopez-Sanchez, Jose Antonio,Taylor, Stuart H.,Willock, David,Kiely, Christopher J.,Hutchings, Graham John
supporting information, p. 11087 - 11099 (2013/08/23)
Iron and copper containing ZSM-5 catalysts are effective for the partial oxidation of ethane with hydrogen peroxide giving combined oxygenate selectivities and productivities of up to 95.2% and 65 mol kgcat -1 h-1, respectively. High conversion of ethane (ca. 56%) to acetic acid (ca. 70% selectivity) can be observed. Detailed studies of this catalytic system reveal a complex reaction network in which the oxidation of ethane gives a range of C2 oxygenates, with sequential C-C bond cleavage generating C1 products. We demonstrate that ethene is also formed and can be subsequently oxidized. Ethanol can be directly produced from ethane, and does not originate from the decomposition of its corresponding alkylperoxy species, ethyl hydroperoxide. In contrast to our previously proposed mechanism for methane oxidation over similar zeolite catalysts, the mechanism of ethane oxidation involves carbon-based radicals, which lead to the high conversions we observe.
